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General Information
    • ISSN: 1793-8244
    • Frequency: Semiyearly
    • DOI: 10.18178/JACN
    • Editor-in-Chief: Dr. Ka Wai Gary Wong
    • Executive Editor: Ms. Nina Lee
    • Abstracting/ Indexing: EI (INSPEC, IET), Engineering & Technology Digital Library, DOAJ, Electronic Journals Library, Ulrich's Periodicals Directory, International Computer Science Digital Library (ICSDL), ProQuest, and Google Scholar.
    • E-mail: jacn@ejournal.net
Editor-in-chief
Dr. Ka Wai Gary Wong
Division of Information and Technology Studies, Faculty of Education, The University of Hong Kong.
It's a honor to serve as the editor-in-chief of JACN. I'll work together with the editors and reviewers to help the journal progress
JACN 2015 Vol.3(2): 99-105 ISSN: 1793-8244
DOI: 10.7763/JACN.2015.V3.149

Proportionate Sign Subband Adpative Filtering Algorithm for Network Echo Cancellers

Ji-Hye Seo, Sang Mok Jung, and Poo Gyeon Park
Abstract—This paper proposes a proportionate sign subband adaptive filtering (PSSAF) and an improved PSSAF (IPSSAF) algorithm for network echo cancellers that deal with impulsive interferences and sparse echo paths. Based on a sign subband adaptive filtering (SSAF) algorithm that is robust against impulsive interferences, the proposed algorithm minimizes L1-norm of the subband a posteriori error vector subject to a weighted constraint on the filter coefficients. A positive definite weighting matrix is used for the constraint. In this paper, we adopt a diagonal proportionate matrix for the constraint to achieve fast initial convergence rate when the impulse response is sparse. The components of it is roughly proportional to the absolute value of current estimate of the filter, so the resulting algorithm is called PSSAF algorithm. To achieve fast initial convergence rate even for rather non-sparse impulse responses, an improved proportionate matrix is also used for the constraint, and the resulting algorithm is named as IPSSAF algorithm. Experimental results show that the proposed algorithms are more robust against highly correlated input signals, impulsive interferences, and double-talk than the original normalized subband adaptive filtering algorithm and the class of proportionate subband adaptive filtering algorithms.

Index Terms—Adaptive filters, proportionate, sign algorithm, subband adaptive filtering algorithm, weighted constraint, weighting matrix.

Ji-Hye Seo is with the Division of IT Convergence Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, Korea (e-mail: bmclubhs@postech.ac.kr).
Sang Mok Jung and Poo Gyeon Park are with the Department of Electrical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, Korea (e-mail: illus2@postech.ac.kr, ppg@postech.ac.kr).

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Cite:Ji-Hye Seo, Sang Mok Jung, and Poo Gyeon Park, "Proportionate Sign Subband Adpative Filtering Algorithm for Network Echo Cancellers," Journal of Advances in Computer Networks vol. 3, no. 2, pp. 99-105, 2015.

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